I wasn’t doing something wrong at least
There is ONE thing I think you can do wrong… and that is doing all of the lessons in a sitting if you are not prepared for the Hell that awaits come review time.
I made this mistake - the lessons were there! I needed to do them! My brain wouldn’t let me leave them there!
I regretted it. The problem is that all those things come back as reviews. If you manage to get 50 lessons right today and each time they pop, you will get 50 more EVERY time they should be studied. Then you start missing some and it mixes in with the OTHER days you finished 50 lessons and you will start getting these massive tidal waves of reviews. And when that happened to me, even though I thought I managed to time it right, I got discouraged but kept at it.
Now what I do is:
Use a script when I level up and immediately study JUST the radicals and JUST the new Kanji, not the vocab from the previous level. This allows me to keep the leveling up more consistent.
For the lessons that pop on a new level, I do 15-20 a day. Since the worst I’ve seen so far was 80, this is enough time to get 80 knocked out before I level up the radicals and get another set of Kanji and vocab. By time I level up, the vocab that popped with the new level are in review and then I focus again on the new kanji using the script. Once I have them 3 dots or so in the review process, I start the next set of 20 lessons until I clear lessons out.
My worst review day was 240 because of my stupidity in knocking out 75 vocab lessons in a day. And I regret that as well because these are the kanji I am now struggling to remember when they are up for reivew.
I guess there is another mistake you can make: quit.
And if you ever get to the point you feel like you want to quit, you hit a wall, or anything like that, stop in. This community is awesome and will help pick you up, put you on your feet, help get you back on the path!